Even after 14 years, there's still a lot of information we don't know about some of our most-loved Grey's Anatomy characters.
That much was made clear on Grey's Anatomy Season 14 Episode 15 which found the characters continuing to try and continue their careers and lives at Grey Sloan Memorial.
When the episode got underway, Meredith was trying to learn more details about her mother's relationship with Marie.
If you watch Grey's Anatomy online, you will know that Meredith needed the patent for polymers from her mother's old friends, but she had no idea Marie hated Ellis before she died.
So, Meredith researched through all of her mother's old journals with the hope of finding out the truth, and hopefully, saving her research project.
“Are you even going to let me license the patent?” Meredith asked when Marie arrived at the hospital.
“There is nothing petty here,” replied Marie, clearly irate at being generalized as a villain because Ellis totally went behind her back.
That's when Marie opened up about Ellis winning her second Harper Avery with work both woman had worked on.
“When she betrayed me, it was unimaginably painful,” she said. “She broke me.” Marie then left Meredith with an ultimatum: Tell the world the truth, or no polymer.
After conversing with Weber, Meredith declined, and Marie said she would be working on the procedure with a team of talented doctors.
And just like that, Meredith's research went out the window.
Elsewhere, Alex worried about his relationship with Jo when it emerged that she was applying for fellowships across the country.
Alex felt like Jo was exiting their relationship, but she felt a sense of freedom. She had run from Paul for so long that she didn't know what freedom felt like ... until he died.
Jo, however, wanted to seal her relationship with Alex in a big way. So, she proposed to him with his own engagement ring.
It was heartwarming and proved that this Grey's couple will be together until the bitter end.
In flashbacks, we got to see Alex's troubled relationship with his mentally ill mother. He struggled to make friends or build connections because he couldn't take anyone to the house.
The one time he did, his mom tried to bash his skull in with a hammer because she forgot to take her medication.
Meanwhile, April continued her downfall, and that meant she continued to get romanced off of Tom. Tom revealed his son died and it made him question his own faith at one point.
This brought them closer, but Jackson is definitely starting to worry about what's going on with his ex-girlfriend. When he dropped their kid off at the house, she had no idea what day it was.
Yes, this is going to get pretty dark.
What do you think of all the latest twists and turns for the characters?
Hit the comments below.
Grey's Anatomy continues Thursdays on ABC!